{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "Previous studies have shown inexplicable declines in breeding waterbirds within western New York / New Jersey Harbor between 1996 and 2002 and elevated polychlorinated dibenzo - p - dioxins and polychlorinated biphenyls ( PCBs ) in double - crested cormorant ( Phalacrocorax auritus ) eggs ."}
{"Chemical": ["polychlorinated dibenzo - p - dioxins", "polychlorinated biphenyls", "PCBs"]}